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Synthesis of platinum single-crystal nanoparticles in water vapor

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Abstract

Platinum (Pt) nanoparticles have broad application in automobile pollution control, sensors, and fuel cells. Single-crystal platinum particles over the range of nano- to micron-meters were synthesized at the Pt/SiC interface in high pressure water vapor at 1200 °C. These particles exhibited a cube–octahedral shape with predominant (111) facets. Formation of the Pt particles is likely due to water vapor-facilitated oxidation of the platinum silicide, resulting from the interaction between SiC and Pt. Well-aligned Pt single-crystal particles with sizes of tens to hundreds nanometers were obtained on the surface of arc-melted Pt2Si after exposure in flowing water vapor (90 cm/min) at 1200 °C for 5 min. The potential applications of this finding are discussed.

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Acknowledgements

The authors thank Dr. Brady, Michael P. and Dr. Geohegan, David B. for helpful comments on this manuscript, Dr. Bei, Hongbin for Pt2Si specimen preparation and Dr. Keiser, James R. for steam exposure tests. Research supported in part by ORNL’s Shared Research Equipment (ShaRE) User Facility, which is sponsored by the Office of Basic Energy Sciences, U.S. Department of Energy. This manuscript has been authored by UT-Battelle, LLC, under Contract No. DE-AC05-00OR22725 with the US Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes.

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  1. Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA

    Ting Cheng, Chad M. Parish & Karren L. More

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  1. Ting Cheng
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  2. Chad M. Parish
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  3. Karren L. More
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Correspondence to Ting Cheng.

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Cheng, T., Parish, C.M. & More, K.L. Synthesis of platinum single-crystal nanoparticles in water vapor. J Mater Sci 48, 3834–3840 (2013). https://doi.org/10.1007/s10853-013-7184-1

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  • DOI: https://doi.org/10.1007/s10853-013-7184-1

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